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Related Concept Videos

Equipments Used to Measure Body Temperature01:13

Equipments Used to Measure Body Temperature

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Body temperature can be assessed using various devices and measured in Celsius or Fahrenheit.
Glass-bulb Thermometer:
Glass-bulb thermometers are hollow glass tubes with a bulb tip containing liquid such as ethanol or mercury. Historically, glass bulb mercury thermometers were the standard device to measure body temperature. Today, mercury thermometers are prohibited in many countries due to the hazardous effects of mercury and the risk of exposure if the glass bulb breaks. In general,...
948
Assessing Body Temperature - Temporal Artery01:19

Assessing Body Temperature - Temporal Artery

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Here is a stepwise guide to assessing the body temperature at the temporal artery using a temporal artery thermometer
Step 1: Perform hand hygiene and don a fresh pair of gloves to prevent cross-infection and ensure patient safety.
Step 2: Explain the procedure to the patient to establish trust. Clear communication establishes trust with the patient, ensures they understand what to expect, promotes cooperation, and enhances comfort during the procedure.  
Step 3: Assess the patient's...
514
Temperature Measurement Sites01:14

Temperature Measurement Sites

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A thermometer measures body temperature. The common sites for measuring body temperature are the oral cavity, axillary region, temporal artery, and skin surface, such as the forehead, abdomen, and axilla. True core body temperature is assessed in the rectum, tympanic membrane, pulmonary artery, esophagus, and urinary bladder.
Oral: When assessing oral temperature, the thermometer tip should be placed under the tongue in the posterior sublingual pocket. It offers accurate readings and can be...
1.5K
Decreased Body Temperature01:29

Decreased Body Temperature

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A decreased body temperature can occur in patients with hypothermia and frostbite. Heat loss with extended cold exposure overpowers the body's ability to create heat, resulting in hypothermia. Core temperature readings help classify hypothermia. Mild hypothermia is temperatures between 32 °C (89.6 °F) and 35°C (95 °F) and is caused by impaired thermoregulation. Moderate hypothermia is temperatures between 28 C (82.4 °F) and 32 °C (89.6 °F) caused by...
599
Body Temperature01:25

Body Temperature

858
The body's temperature, measured in degrees, is determined by the balance between heat production and dissipation to the surrounding environment. For instance, if exercising vigorously, the body will produce more heat, causing sweat and dissipating that heat. Despite extreme environmental conditions and physical exertion, the human temperature-control system maintains a constant core body temperature (the temperature of deep tissues, which are the tissues located beneath the skin and other...
858
Assessing Body Temperature - Oral01:14

Assessing Body Temperature - Oral

717
Here are the steps to accurately measure oral temperature using an electronic thermometer:
Step 1:
Start by practicing proper hand hygiene to prevent the spread of microorganisms.
Step 2:
Take the thermometer out of the charging unit, switch it on, and wait for the ready sign.
Step 3:
Gently slide the probe cover until a click is heard. This simple action prevents cross-contamination and ensures the correct placement of the probe cover.
Step 4:
Instruct the patient to open their mouth and place...
717

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Related Experiment Video

Updated: May 25, 2025

Near-Infrared Temperature Measurement Technique for Water Surrounding an Induction-heated Small Magnetic Sphere
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Near-Infrared Nanothermometer Reveals Temperature Discrepancy between Organs and Body Surface for Heatstroke

Meilin Liu1, Yaru Sun1, Yi Zhang1

  • 1Department of Medical Biochemistry and Molecular Biology, School of Medicine, Jinan University, Guangzhou, Guangdong 510632, China.

Nano Letters
|February 28, 2025
PubMed
Summary

A new near-infrared nanothermometer accurately measures organ temperature during heatstroke. This tool reveals liver temperature is higher than rectal temperature, suggesting heatstroke injury begins at lower temperatures than previously thought.

Keywords:
Near-infrared emissionheat-related illnessliver failurenanoproberatiometric luminescence

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Area of Science:

  • Biomedical Engineering
  • Nanotechnology
  • Physiology

Background:

  • Organ temperatures can differ significantly from surface temperatures during heatstroke, potentially causing acute organ failure.
  • Current methods lack noninvasive techniques for real-time organ temperature monitoring, obscuring temperature discrepancies.

Purpose of the Study:

  • To develop a novel near-infrared emissive nanothermometer for accurate, noninvasive organ temperature monitoring.
  • To investigate the temperature difference between organs and core body temperature during heatstroke.

Main Methods:

  • Developed a nanothermometer using Nd³⁺ and Yb³⁺ codoping for dual near-infrared emissions (980 and 1330 nm) under 808 nm excitation.
  • Utilized differential temperature responses of emissions to construct a ratiometric nanoprobe for temperature detection.
  • Administered the nanoprobe intravenously in mice to monitor liver temperature in real-time.

Main Results:

  • The nanothermometer demonstrated temperature-dependent dual emissions, enabling accurate ratiometric temperature sensing.
  • The nanoprobe rapidly accumulated in the mouse liver, showing liver temperature was consistently ~1.5 °C higher than rectal temperature.
  • Liver injury onset was observed at a rectal temperature of 42 °C, challenging the conventional 43 °C threshold in heatstroke models.

Conclusions:

  • Introduced a robust near-infrared nanothermometer for precise organ temperature measurement.
  • Demonstrated significant organ-core temperature discrepancies during heatstroke, impacting injury onset assessment.
  • This technology offers a new approach to understanding and diagnosing heat-related illnesses.